Lid, and lid adaptor

Abstract

To make it easy to remove from a lid frame and to improve sealing performance with a lid frame.SOLUTION: A lid 100 comprises: a support member 20 removably arranged within a cylindrical lid frame 5; a lid body 10 removably supported by the support member 20; a pressed member 72 provided on an outer peripheral surface of the support member 20 and pressed toward an inner peripheral surface of the lid frame 5; and a pressing member 73 contacting the pressed member 72 and applying a pressing force toward the pressed member 72. The pressed member 72 is configured to be able to expand and contract toward the inner peripheral surface of the lid frame 5 when a pressing force is applied by the pressing member 73.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a lid and a lid adapter.

Background Art

[0002] For example, Patent Document 1 discloses a lid body that is attached to an outer frame portion provided at the upper end of a riser pipe buried in the ground. There are lid bodies with different shapes and sizes. When trying to attach lid bodies with different shapes or sizes to the outer frame portion, a gap may occur between the lid body and the outer frame portion. Therefore, Patent Document 1 further discloses a lid attachment adapter provided in the gap between the lid body and the outer frame portion.

[0003] When arranging the lid attachment adapter between the lid body and the outer frame portion, an adhesive is applied to the inner peripheral surface of the outer frame portion. Then, the lid attachment adapter is attached to the portion of the inner peripheral surface of the outer frame portion where the adhesive is applied. By this, the lid attachment adapter is fixed to the outer frame portion via the adhesive. After fixing the lid attachment adapter to the outer frame portion, the lid body can be attached to the outer frame portion by placing the lid body on the lid attachment adapter.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the invention disclosed in Patent Document 1, when inspecting the inside of the riser pipe, an inspection member is inserted into the opening portion of the outer frame portion. However, since the lid attachment adapter is fixed to the outer frame portion, the diameter of the opening portion for inspection becomes small, making it difficult to inspect the inside of the riser pipe. Therefore, it is preferable that the lid attachment adapter is not fixed to the outer frame portion.

[0006] The present invention has been made in view of such a point, and an object thereof is to provide a lid and a lid adapter that can be easily removed from a lid frame and can improve the sealing performance with the lid frame.

Means for Solving the Problems

[0007] The lid according to the present invention includes a support member detachably disposed in a cylindrical lid frame, a lid body detachably supported by the support member, a pressed member provided on an outer peripheral surface of the support member and pressed toward an inner peripheral surface of the lid frame, and a pressing member that contacts the pressed member and applies a pressing force toward the pressed member. The pressed member is configured to be stretchable toward the inner peripheral surface of the lid frame by being applied with the pressing force by the pressing member.

[0008] According to the lid, a pressed member is provided between the lid frame and the support member that supports the lid body. At this time, even for support members having different sizes, by adjusting the magnitude of the pressing force with which the pressing member presses the pressed member, the amount by which the pressed member extends toward the inner peripheral surface of the lid frame can be adjusted. Therefore, even when support members of various sizes are attached to the lid frame, the sealing performance between the lid frame and the support member can be ensured by adjusting the amount by which the pressed member extends toward the inner peripheral surface of the lid frame. Further, since the support member is detachable from the lid frame, it can be easily removed from the lid frame.

[0009] According to a preferred aspect of the present invention, the support member has a vertical surface provided on an outer peripheral surface of the support member and extending vertically, and a horizontal surface extending from an upper end of the vertical surface toward an inner peripheral surface of the lid frame. The pressed member is provided at a corner portion formed by the vertical surface and the horizontal surface of the support member.

[0010] According to the above aspect, when the pressed member is provided at the corner of the support member, the pressed member is sandwiched between the lid frame and the vertical surface and is pressed against the horizontal surface. At this time, the pressed member is deformed by being pressed against the horizontal surface, and its upward elongation is restricted, so that the sealing property between the lid frame and the support member can be further ensured.

[0011] According to another preferred aspect of the present invention, the pressed member is disposed so as to be sandwiched between the horizontal surface of the support member and the pressing member. The pressing member is configured to apply the pressing force to the pressed member from below.

[0012] According to the above aspect, by adjusting the magnitude of the pressing force from the pressing member to the pressed member, the amount of crushing of the pressed member can be adjusted, and the amount by which the pressed member extends toward the inner peripheral surface of the lid frame can be adjusted. Therefore, even when support members of various sizes are attached to the lid frame, the sealing property between the lid frame and the support member can be ensured by adjusting the magnitude of the pressing force of the pressing member against the pressed member.

[0013] According to another preferred aspect of the present invention, the pressing member is configured to be slidable in the vertical direction with respect to the support member.

[0014] According to the above aspect, by sliding the pressing member with respect to the support member, the amount by which the pressed member extends toward the inner peripheral surface of the lid frame can be adjusted.

[0015] According to another preferred aspect of the present invention, the lid includes a protruding portion that protrudes upward from the upper end portion of the support member toward the lid frame.

[0016] According to the above aspect, when the lid is attached to the lid frame, the gap between the lid frame and the support member is covered from above by the protruding portion. Therefore, it is possible to make it difficult for foreign matters such as dust to enter between the lid frame and the support member.

[0017] According to another preferred aspect of the present invention, the lid includes a fixing mechanism for fixing the position of the pressing member with respect to the support member.

[0018] According to the above aspect, the position of the pressing member with respect to the support member can be fixed in a state where the amount by which the pressed member extends toward the inner peripheral surface of the lid frame is adjusted. Therefore, the lid can be attached to the lid frame in a state where the amount by which the pressed member extends toward the inner peripheral surface of the lid frame is adjusted.

[0019] The lid adapter according to the present invention is a lid adapter detachably provided between a cylindrical lid frame and a lid body disposed inside the lid frame. The lid adapter includes a main body provided between the lid frame and the lid body, a pressed member provided on an outer peripheral surface of the main body and pressed toward an inner peripheral surface of the lid frame, and a pressing member that contacts the pressed member and applies a pressing force toward the pressed member. The pressed member is configured to be expandable and contractible toward the inner peripheral surface of the lid frame by the pressing force applied by the pressing member.

[0020] According to the lid adapter, the lid adapter is disposed between the lid frame and the lid body. At this time, by adjusting the magnitude of the pressing force with which the pressing member presses the pressed member, the amount by which the pressed member extends toward the inner peripheral surface of the lid frame can be adjusted. Therefore, by disposing the lid adapter between the lid frame and the lid body and adjusting the amount by which the pressed member extends toward the inner peripheral surface of the lid frame, the sealing performance between the lid frame and the lid adapter can be ensured. Further, since the lid adapter is detachable from the lid frame, it can be easily removed from the lid frame.

Advantages of the Invention

[0021] According to the present invention, it is possible to provide a lid and a lid adapter that are easily removable from the lid frame and can improve the sealing performance with the lid frame.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0023] Hereinafter, embodiments of the lid according to the present invention will be described with reference to the drawings. However, the embodiments described below are merely one embodiment of the present invention and are not intended to particularly limit the present invention. In addition, members and parts having the same function are denoted by the same reference numerals, and duplicate explanations are omitted or simplified as appropriate.

[0024] <First Embodiment> First, the lid 100 according to the first embodiment will be described. FIG. 1 is a plan view showing the lid 100. FIG. 2 is a cross-sectional view of the lid 100 taken along the line II-II in FIG. 1. FIG. 3 is a view corresponding to FIG. 2 showing a state in which the first lid receiving member 30 of the lid 100 floats with respect to the lid frame 5. In the present embodiment, as shown in FIG. 2, the lid 100 includes a lid body 10 and a support member 20. The lid 100 is provided on a pipeline 1 buried in the ground. The pipeline 1 has a riser pipe 2. The riser pipe 2 is buried in the ground and extends vertically. The type of the riser pipe 2 is not particularly limited. Here, the riser pipe 2 is, for example, a manhole or a part of a sewer.

[0025] Although not shown in the figure, the pipeline 1 has a main pipeline. The main pipeline is connected to the lower end of the riser pipe 2 and is a pipeline connecting the riser pipe 2 and a main sewer pipe (not shown). The main pipeline extends horizontally, for example, and is arranged along a direction intersecting the riser pipe 2.

[0026] In the present embodiment, a lid frame 5 extending in the vertical direction is provided on the riser pipe 2 of the pipeline 1. Here, the lid frame 5 is provided at the upper end portion of the riser pipe 2. The lid frame 5 is fixed to the riser pipe 2. The lid frame 5 is cylindrical. A communication hole 6 penetrating vertically is formed in the lid frame 5. Through the communication hole 6, the lid frame 5 and the riser pipe 2 communicate with each other. As shown in FIG. 1, for example, the communication hole 6 is circular in plan view, but the shape of the communication hole 6 is not particularly limited.

[0027] As shown in Fig. 2, the lid frame 5 has a frame cylinder portion 7 and a frame attachment portion 8. The frame cylinder portion 7 is cylindrical and is fitted into the riser pipe 2. Here, the frame cylinder portion 7 is fitted to the inner peripheral surface of the riser pipe 2. The frame attachment portion 8 is provided at the upper end portion of the frame cylinder portion 7 and extends upward from the frame cylinder portion 7. Here, the outer diameter of the frame attachment portion 8 is larger than that of the frame cylinder portion 7. The frame attachment portion 8 is disposed above the riser pipe 2. Here, the frame attachment portion 8 has a lower frame attachment portion 8a and an upper frame attachment portion 8b. The lower frame attachment portion 8a is disposed above the frame cylinder portion 7 and is continuous with the frame cylinder portion 7. The upper frame attachment portion 8b is disposed above the lower frame attachment portion 8a and is continuous with the lower frame attachment portion 8a. For example, the communication hole 6 is formed by the inner peripheral surface of the upper frame attachment portion 8b. Here, the inner diameter of the upper frame attachment portion 8b is larger than the inner diameter of the lower frame attachment portion 8a. Therefore, a frame step portion 8c is formed by the upper frame attachment portion 8b and the lower frame attachment portion 8a.

[0028] In this embodiment, the lid frame 5 has a frame inner peripheral surface 9. The frame inner peripheral surface 9 is the surface of the inner peripheral surface of the lid frame 5 that comes into contact with a pressed member 72 (see Fig. 2) described later. The frame inner peripheral surface 9 is the portion of the inner peripheral surface of the lid frame 5 that is located innermost. Here, the frame inner peripheral surface 9 is formed by the inner peripheral surface of the lower frame attachment portion 8a. However, the frame inner peripheral surface 9 may be formed by the inner peripheral surface of the frame cylinder portion 7, or may be configured to extend from the inner peripheral surface of the frame cylinder portion 7 to the inner peripheral surface of the lower frame attachment portion 8a.

[0029] The lid 100 according to this embodiment is detachably disposed on the lid frame 5. In other words, the lid 100 is detachably supported by the lid frame 5 and is detachably attached to the lid frame 5. Here, "detachable" means, for example, a state of being attached to the lid frame 5 without using a fixing means such as an adhesive.

[0030] As described above, as shown in FIG. 2, the lid 100 includes a lid body 10 and a support member 20. Here, the support member 20 is provided within the lid frame 5, and the lid body 10 is provided on the support member 20. In the present embodiment, in order to improve the sealing performance between the lid frame 5 and the support member 20, the lid 100 further includes a member to be pressed 72 and a pressing member 73.

[0031] The support member 20 is detachably arranged within the cylindrical lid frame 5. Here, the support member 20 is cylindrical. As shown in FIG. 1, in plan view, the shape of the support member 20 corresponds to the shape of the communication hole 6 of the lid frame 5, and here it is circular. However, the shape of the support member 20 is not particularly limited. The support member 20 may be integrally formed by one member, or may be formed by combining a plurality of members. In the present embodiment, the support member 20 has a first lid receiving member 30 and a second lid receiving member 70, and is composed of two members. Here, the first lid receiving member 30 and the second lid receiving member 70 are cylindrical. The first lid receiving member 30 is provided within the second lid receiving member 70.

[0032] The first lid receiving member 30 is provided on the lid frame 5 via the second lid receiving member 70. Here, the first lid receiving member 30 is detachably attached to the lid frame 5. As shown in FIG. 1, in plan view, the shape of the first lid receiving member 30 corresponds to the shape of the communication hole 6 of the lid frame 5, and here it is circular. However, the shape of the first lid receiving member 30 is not particularly limited.

[0033] In this embodiment, as shown in FIG. 2, a seal member 31 is provided at a portion of the outer peripheral surface of the first lid receiving member 30 that contacts the second lid receiving member 70. The seal member 31 is provided along the circumferential direction of the first lid receiving member 30. The seal member 31 is ring-shaped. Note that the material forming the seal member 31 is not particularly limited. Here, the seal member 31 is formed of an elastic member having a predetermined elastic force. As the elastic member, for example, rubber can be used. As the rubber, synthetic rubber (for example, ethylene propylene rubber (EPDM)) can be preferably used. By this seal member 31, the sealing performance between the first lid receiving member 30 and the second lid receiving member 70 when the first lid receiving member 30 is attached to the lid frame 5 via the second lid receiving member 70 can be improved.

[0034] In this embodiment, the seal member 31 has a base portion 32 and a contact portion 33. The base portion 32 is provided on the outer peripheral surface of the first lid receiving member 30. The base portion 32 extends vertically and is ring-shaped. The base portion 32 is attached to the outer peripheral surface of the first lid receiving member 30. The contact portion 33 extends obliquely outward from the lower end of the base portion 32. In the following description, "inward" refers to the direction toward the center of the support member 20 (in other words, the lid body 10 or the lid frame 5), and refers to the direction toward the inner side in the radial direction. "Outward" refers to, for example, the direction away from the center of the support member 20, and refers to the direction toward the outer side in the radial direction. Here, the contact portion 33 is inclined so as to extend toward the outer side in the radial direction of the first lid receiving member 30 as it goes upward from the lower end of the base portion 32. In this embodiment, the longitudinal section of the seal member 31 is formed in an L shape by the base portion 32 and the contact portion 33. Here, the contact portion 33 is configured such that an elastic force is applied to the outside of the first lid receiving member 30. Therefore, when the contact portion 33 contacts the second lid receiving member 70, the sealing performance with the second lid receiving member 70 is improved.

[0035] In this embodiment, a cylindrical lid receiving cylindrical portion 35 is provided on the first lid receiving member 30. The lid receiving cylindrical portion 35 extends downward from the first lid receiving member 30. Here, a lid receiving hole 37 is formed in the support member 20. The lid receiving hole 37 is a hole that penetrates the support member 20 vertically. Here, the lid receiving hole 37 is formed so as to penetrate the first lid receiving member 30 vertically. The lid receiving hole 37 communicates with the inside of the riser pipe 2 through the lid receiving cylindrical portion 35. Here, a lid receiving step portion 38 having an inner diameter smaller on the lower side than on the upper side is provided below the lid receiving hole 37.

[0036] As shown in FIG. 3, the support member 20 is configured to be able to float with respect to the lid frame 5. In this embodiment, the first lid receiving member 30 of the support member 20 is configured to be able to float with respect to the lid frame 5. The support member 20 has an exhaust function. In this embodiment, when the first lid receiving member 30 floats with respect to the lid frame 5, a gap S1 formed between the first lid receiving member 30 and the second lid receiving member 70 functions as an exhaust function for discharging the air in the pipeline 1 to the outside of the pipeline 1. In this embodiment, a stopper 39 is provided on the support member 20. Specifically, the stopper 39 is provided on the first lid receiving member 30 of the support member 20. The stopper 39 engages with the second lid receiving member 70 when the first lid receiving member 30 floats. When the stopper 39 engages with the second lid receiving member 70, further upward movement of the first lid receiving member 30 is restricted. In this embodiment, the stopper 39 has a stopper rod-shaped portion 39a extending downward from the back surface of the peripheral end portion of the first lid receiving member 30, and a claw portion 39b protruding from the lower end portion of the stopper rod-shaped portion 39a toward the second lid receiving member 70 side, that is, outward. When the first lid receiving member 30 floats with respect to the lid frame 5, the claw portion 39b catches on the second lid receiving member 70, thereby restricting the floating of the first lid receiving member 30. FIG. 3 shows a state in which the claw portion 39b of the stopper 39 is caught on the second lid receiving member 70. The number of stoppers 39 is not particularly limited. Here, a plurality of stoppers 39 are provided along the circumferential direction of the support member 20.

[0037] In this embodiment, the lid 10 is detachably supported by the support member 20. Specifically, the lid 10 is received by the first lid receiving member 30 of the support member 20. The lid 10 is detachably attached to the support member 20 (for example, the first lid receiving member 30). In this embodiment, the lid 10 is attached to the first lid receiving member 30 by fitting into the lid receiving hole 37. Here, when the lid 10 fits into the lid receiving hole 37, the lid 10 is placed on the lid receiving step portion 38 of the first lid receiving member 30. Thus, the lid 10 is supported by the support member 20. The shape of the lid 10 is not particularly limited. Here, as shown in FIG. 1, the lid 10 has a shape corresponding to the lid receiving hole 37, and is circular in plan view.

[0038] As shown in FIG. 2, a cylindrical lid cylindrical portion 12 is provided on the lid 10. The lid cylindrical portion 12 extends downward from the lower surface of the lid 10. Further, a lid seal member 11 is provided on the outer peripheral surface of the lid cylindrical portion 12. The lid seal member 11 contacts the inner peripheral surface of the first lid receiving member 30 and is provided along the circumferential direction of the lid cylindrical portion 12. The lid seal member 11 is ring-shaped. The material forming the lid seal member 11 is not particularly limited, but is, for example, the same material as the seal member 31 described above. Here, the lid seal member 11 is formed of an elastic member such as rubber (for example, synthetic rubber such as EPDM). The shape of the lid seal member 11 is also not particularly limited, but here, similar to the seal member 31, the longitudinal cross-sectional shape is in an L shape. Although not shown, the lid seal member 11, similar to the seal member 31, has a base portion provided on the outer peripheral surface of the lid cylindrical portion 12 and a contact portion that slopes outward so as to extend outward as it goes upward from the lower end of the base portion. The contact portion of the lid seal member 11 contacts the inner peripheral surface of the first lid receiving member 30. This lid seal member 11 improves the sealing performance between the lid 10 and the first lid receiving member 30.

[0039] Next, the second lid receiving member 70 of the support member 20 will be described. The second lid receiving member 70 is detachably provided between the lid frame 5 and the first lid receiving member 30. In the present embodiment, the second lid receiving member 70 is not fixed to the lid frame 5 and the first lid receiving member 30 by a fixing material such as an adhesive or a fixing mechanism. The second lid receiving member 70 is detachable from the lid frame 5 and is configured to be detachable from the first lid receiving member 30. Therefore, as shown in FIG. 3, the first lid receiving member 30 is configured to be able to float with respect to the second lid receiving member 70. Note that the second lid receiving member 70 is an example of the lid adapter according to the present invention.

[0040] FIG. 4 and FIG. 5 are a perspective view and a plan view of the second lid receiving member 70 according to the present embodiment, respectively. As shown in FIG. 4, the second lid receiving member 70 is cylindrical, specifically, cylindrical. In the present embodiment, the second lid receiving member 70 includes a lid receiving main body 71. As shown in FIG. 2, the lid receiving main body 71 is provided between the lid frame 5 and the first lid receiving member 30. The shape and configuration of the lid receiving main body 71 are not particularly limited, but it is preferably a shape and configuration that fills at least a part of the gap between the lid frame 5 and the first lid receiving member 30. Here, the lid receiving main body 71 is a cylindrical shape (here, a cylindrical shape) extending in the vertical direction. The lid receiving main body 71 is an example of the main body according to the present invention. The lid receiving main body 71 has a lid receiving lower cylindrical portion 81, a lid receiving flange portion 82, and a lid receiving upper cylindrical portion 83.

[0041] The lid receiving lower cylindrical portion 81 constitutes the lower part of the lid receiving main body 71. The lid receiving lower cylindrical portion 81 is disposed inside the frame cylindrical portion 7 of the lid frame 5 and is a cylindrical shape extending in the vertical direction. In the present embodiment, the lid receiving lower cylindrical portion 81 overlaps with a part of the frame cylindrical portion 7 of the lid frame 5 in the vertical direction and also overlaps with a part of the lower frame mounting portion 8a of the frame mounting portion 8 in the vertical direction.

[0042] In this embodiment, an inner circumferential stepped portion 81a is provided on the inner circumferential surface of the lower lid receiving cylindrical portion 81. The inner circumferential stepped portion 81a is a step such that the inner diameter of the upper portion is larger than that of the lower portion. As shown in FIG. 3, the inner circumferential stepped portion 81a is a portion where the claw portion 39b of the stopper 39 of the first lid receiving member 30 catches when the first lid receiving member 30 floats with respect to the lid frame 5 (in other words, the second lid receiving member 70).

[0043] The lid receiving flange portion 82 is connected to the upper end portion of the lower lid receiving cylindrical portion 81. Here, the lid receiving flange portion 82 is a cylindrical member extending outward from the upper end portion of the lower lid receiving cylindrical portion 81. However, as shown in FIG. 5, notches 82a may be formed on the inner circumferential surface of the lid receiving flange portion 82 in a plan view. Here, three notches 82a are formed along the circumferential direction of the lid receiving flange portion 82, but the number of notches 82a is not particularly limited. The lid receiving flange portion 82 extends horizontally, for example.

[0044] In this embodiment, the support member 20 has a vertical surface 21 and a horizontal surface 22. The vertical surface 21 is provided on the outer circumferential surface of the support member 20 and is a surface extending vertically. In this embodiment, the vertical surface 21 constitutes the outer circumferential surface of the lid receiving body 71 of the second lid receiving member 70 (specifically, the outer circumferential surface of the lower lid receiving cylindrical portion 81). The horizontal surface 22 is provided on the outer circumferential surface of the support member 20 (here, the outer circumferential surface of the second lid receiving member 70) and is a surface extending in a direction intersecting the vertical surface 21. The horizontal surface 22 extends from the upper end of the vertical surface 21 toward the inner circumferential surface of the lid frame 5. Here, the horizontal surface 22 extends outward from the upper end of the vertical surface 21. The horizontal surface 22 constitutes the lower surface of the lid receiving flange portion 82 of the second lid receiving member 70. In this embodiment, as shown in FIG. 2, a corner portion 85 is formed by the vertical surface 21 and the horizontal surface 22 of the support member 20. In other words, the corner portion 85 is formed by the lower lid receiving cylindrical portion 81 and the lid receiving flange portion 82. The corner portion 85 is located outside the vertical surface 21 and below the horizontal surface 22.

[0045] The lid receiving upper cylindrical portion 83 is connected to the lid receiving flange portion 82. Here, the lid receiving upper cylindrical portion 83 extends upward from the lid receiving flange portion 82. The lid receiving upper cylindrical portion 83 is disposed above the lid receiving lower cylindrical portion 81. In the present embodiment, the lid receiving upper cylindrical portion 83 protrudes outward from the lid receiving flange portion 82. As shown in FIG. 2, the lower surface of the lid receiving upper cylindrical portion 83 is placed on the upper surface of the lower frame mounting portion 8a of the lid frame 5. The lid receiving upper cylindrical portion 83 is disposed in the frame step portion 8c of the lid frame 5. Here, the inner peripheral surface of the lid receiving upper cylindrical portion 83 is inclined so as to extend outward as it goes upward.

[0046] In the present embodiment, the lid 100 includes a protruding portion 86. The protruding portion 86 is connected to the support member 20. The protruding portion 86 protrudes outward from the upper end portion of the support member 20 toward the upper side of the lid frame 5. Here, the protruding portion 86 extends outward from the upper end portion of the second lid receiving member 70 of the support member 20 (specifically, the upper end portion of the lid receiving upper cylindrical portion 83). At least a part of the protruding portion 86 is located above the upper frame mounting portion 8b of the lid frame 5. At least a part of the protruding portion 86 may be in contact with the upper surface of the upper frame mounting portion 8b or may be spaced apart from the upper surface of the upper frame mounting portion 8b. The protruding portion 86 is ring-shaped along the circumferential direction of the support member 20 (for example, the second lid receiving member 70).

[0047] As shown in FIG. 5, notches 86a (for example, two opposing notches 86a) may be formed at the peripheral end portion of the protruding portion 86 in plan view. The notches 86a are recessed inward from the outer end of the protruding portion 86. By inserting a hand or a removal tool into the notches 86a, it is possible to easily remove the support member 20 (here, the second lid receiving member 70) from the lid frame 5.

[0048] Incidentally, in the present embodiment, the lid frame 5 is fixed to the vertical pipe 2 and its size (e.g., inner diameter) can be constant. However, the support member 20 that supports the lid body 10 may have different sizes. The "size" of the support member 20 here refers to, for example, the size of the outer diameter of the support member 20. For example, when a support member 20 with a small outer diameter is attached to the lid frame 5, the gap between the lid frame 5 and the support member 20 becomes large. When the gap is large, the sealing performance between the lid frame 5 and the support member 20 deteriorates, and the support member 20 (especially the second lid receiving member 70) is likely to be removed from the lid frame 5. Also, when the gap is large, the odor in the pipeline 1 may easily leak to the outside.

[0049] Therefore, in the present embodiment, as shown in FIG. 2, by providing a member to be pressed 72 and a pressing member 73 between the lid frame 5 and the support member 20, the gap between the lid frame 5 and the support member 20 when the support member 20 is attached to the lid frame 5 can be filled. By using the member to be pressed 72 and the pressing member 73 according to the present embodiment, even if the support members 20 have different sizes, the sealing performance between the lid frame 5 and the support member 20 can be improved.

[0050] As shown in FIG. 2, the member to be pressed 72 is provided on the outer peripheral surface of the support member 20. Here, the member to be pressed 72 is provided on the outer peripheral surface of the second lid receiving member 70. The member to be pressed 72 is pressed from the outer peripheral surface of the second lid receiving member 70 toward the inner peripheral surface of the lid frame 5. In the present embodiment, the member to be pressed 72 is provided on the outer peripheral surface (here, the vertical surface 21) of the lid receiving lower cylindrical portion 81 of the second lid receiving member 70, or on the lower surface (here, the horizontal surface 22) of the lid receiving flange portion 82, and is provided at the corner portion 85 formed by the vertical surface 21 and the horizontal surface 22. The member to be pressed 72 is in contact with the vertical surface 21 and the horizontal surface 22 of the support member 20. As shown in FIG. 4, the member to be pressed 72 is in a ring shape along the circumferential direction of the lid receiving lower cylindrical portion 81 of the second lid receiving member 70. The longitudinal cross-section of the member to be pressed 72 is, for example, circular.

[0051] The material forming the pressed member 72 is not particularly limited. In the present embodiment, the pressed member 72 is formed of an elastic member having a predetermined elastic force. The elastic member is, for example, rubber. As the rubber, for example, synthetic rubber such as EPDM can be preferably used. Thus, since the pressed member 72 is formed of the elastic member, it can expand and contract from the outer peripheral surface of the second lid receiving member 70 (specifically, the outer peripheral surface of the lid receiving lower cylindrical portion 81) toward the inner peripheral surface of the lid frame 5. The pressed member 72 is pressed toward the inner peripheral surface of the lid frame 5 by expanding. Here, the pressed member 72 contacts the inner peripheral surface of the lid frame 5 within the frame inner peripheral surface 9 and is pressed against the frame inner peripheral surface 9.

[0052] FIG. 6 is a cross-sectional view of the second lid receiving member 70 of the support member 20 in the VI-VI cross-section of FIG. 5. FIG. 7 is a view corresponding to FIG. 6 showing a state in which the pressing member 73 has moved upward and is pressing the pressed member 72. As shown in FIGS. 6 and 7, the pressing member 73 contacts the pressed member 72 and applies a pressing force to the pressed member 72. The pressing member 73 is slidable in the vertical direction with respect to the support member 20 (specifically, the lid receiving lower cylindrical portion 81 of the second lid receiving member 70). In the present embodiment, as shown in FIG. 2, the pressing member 73 is disposed outside the lid receiving lower cylindrical portion 81 and below the lid receiving flange portion 82. The pressing member 73 is disposed between the lid frame 5 and the support member 20. As shown in FIG. 4, the pressing member 73 has a cylindrical shape (specifically, a cylindrical shape) extending in the vertical direction. Here, as shown in FIG. 7, the pressing member 73 is configured to be slidable so as to contact the pressed member 72 from below and crush the pressed member 72 upward.

[0053] As shown in Fig. 6, the member 72 to be pressed is arranged to be sandwiched between the lateral surface 22 of the support member 20 and the pressing member 73 at the corner portion 85. When the pressing member 73 slides upward while being in contact with the member 72 to be pressed, as shown in Fig. 7, a pressing force is applied to the member 72 to be pressed from below. By this, the member 72 to be pressed is pressed by the pressing member 73 and crushed. The member 72 to be pressed is configured to extend radially outward by being pressed from below by the pressing member 73. In the present embodiment, the amount of extension of the member 72 to be pressed radially outward is determined according to the degree to which the pressing member 73 presses the member 72 to be pressed, that is, the magnitude of the pressing force applied to the member 72 to be pressed.

[0054] In the present embodiment, as shown in Fig. 7, the lid 100 includes a fixing mechanism 90. The fixing mechanism 90 is a mechanism for fixing the position of the pressing member 73 with respect to the support member 20. Here, the fixing mechanism 90 fixes the vertical position of the pressing member 73 with respect to the second lid receiving member 70. As shown in Fig. 5, three fixing mechanisms 90 are provided along the circumferential direction of the support member 20. The fixing mechanism 90 is provided at a portion of a notch 82a formed in the lid receiving flange portion 82 of the second lid receiving member 70 in a plan view. However, the position, number, and configuration of the fixing mechanism 90 are not particularly limited.

[0055] As shown in Fig. 7, the fixing mechanism 90 has a main body side flange 91, a pressing side flange 92, and a fixing screw 93. The main body side flange 91 is a plate-like member provided on the support member 20. Here, the main body side flange 91 extends inward from the lower end portion of the inner peripheral surface of the lid receiving lower cylindrical portion 81 of the second lid receiving member 70. The main body side flange 91 extends horizontally. A first fixing hole 91a penetrating the main body side flange 91 in the vertical direction is formed in the main body side flange 91.

[0056] The pressing flange 92 is plate-shaped and provided on the pressing member 73. Here, the pressing flange 92 extends inward from the lower end of the inner peripheral surface of the pressing member 73. The pressing flange 92 is disposed below the main body side flange 91 and is disposed at a position overlapping the main body side flange 91 in plan view. The pressing flange 92 extends horizontally and is disposed parallel to the main body side flange 91. A second fixing hole 92a penetrating the pressing flange 92 in the vertical direction is formed in the pressing flange 92. In plan view, the second fixing hole 92a overlaps the first fixing hole 91a.

[0057] The fixing screw 93 is inserted into the first fixing hole 91a of the main body side flange 91 and the second fixing hole 92a of the pressing flange 92. By inserting the fixing screw 93 into the first fixing hole 91a and the second fixing hole 92a, the support member 20 and the pressing member 73 can be fastened. As a result, the vertical position of the pressing member 73 with respect to the lid receiving lower cylindrical portion 81 of the second lid receiving member 70 is fixed. In addition, in FIGS. 4 to 6, the illustration of the fixing screw 93 is omitted.

[0058] The configuration of the lid 100 according to the present embodiment has been described above. As shown in FIG. 2, for example, when attaching the lid 100 to the lid frame 5, first, according to the size of the support member 20 (that is, the size of the outer diameter of the support member 20), the amount of radial outward extension of the pressed member 72 is adjusted. For example, when the support member 20 is small and the gap between the lid frame 5 and the support member 20 is large, as shown in FIG. 7, the pressing member 73 is moved upward with respect to the support member 20 (here, the second lid receiving member 70) to increase the amount of extension of the pressed member 72. On the other hand, when the support member 20 is large and the gap between the lid frame 5 and the support member 20 is small, the pressing member 73 is moved downward with respect to the support member 20 (here, the second lid receiving member 70) to decrease the amount of extension of the pressed member 72. At the position of the pressing member 73 when the amount of extension of the pressed member 72 is adjusted in this way, the pressing member 73 is fixed to the support member 20 (here, the second lid receiving member 70) by the fixing mechanism 90. Then, as shown in FIG. 2, the second lid receiving member 70 in a state where the amount of extension of the pressed member 72 is adjusted is attached to the lid frame 5, and the first lid receiving member 30 is attached to the second lid receiving member 70. By this, the support member 20 can be attached to the lid frame 5. At this time, since the pressed member 72 is pressed against the inner peripheral surface 9 of the frame of the lid frame 5, the sealing performance between the lid frame 5 and the second lid receiving member 70 can be ensured. And by attaching the lid body 10 to the support member 20, the lid 100 can be attached to the lid frame 5. In the present embodiment, the support member 20 (specifically, the second lid receiving member 70) is not fixed to the lid frame 5 with, for example, an adhesive or the like. Therefore, even when the support member 20 is attached to the lid frame 5, the support member 20 (specifically, the second lid receiving member 70) can be easily removed from the lid frame 5.

[0059] In this embodiment, when the amount of drainage flowing through the pipeline 1 increases in the state where the lid 100 is attached to the lid frame 5, the pressure in the pipeline 1 rises. At this time, the pressure in the pipeline 1 becomes higher than the pressure outside the pipeline 1. Here, when the pressure difference between the inside and outside of the pipeline 1 becomes higher than a predetermined reference pressure, as shown in FIG. 3, the first lid receiving member 30 floats with respect to the lid frame 5 and the second lid receiving member 70 of the support member 20. When the first lid receiving member 30 floats, the claw portion 39b of the stopper 39 is caught from below by the second lid receiving member 70 (specifically, the inner peripheral step portion 81a of the lid receiving lower cylindrical portion 81). In this way, when the stopper 39 is caught by the second lid receiving member 70, the further upward movement of the first lid receiving member 30 is restricted.

[0060] When the first lid receiving member 30 floats with respect to the lid frame 5, a gap S1 is formed between the second lid receiving member 70 and the first lid receiving member 30. As a result, the air in the pipeline 1 flows to the outside of the pipeline 1 through the gap S1 between the second lid receiving member 70 and the first lid receiving member 30. As a result, the pressure in the pipeline 1 decreases. In this embodiment, even when the first lid receiving member 30 floats, the second lid receiving member 70 is in a state of being attached to the lid frame 5 and the pressed member 72 is pressed against the inner peripheral surface 9 of the frame of the lid frame 5. Therefore, even when the first lid receiving member 30 floats, the sealing performance between the lid frame 5 and the second lid receiving member 70 can be ensured. When the pressure in the pipeline 1 decreases and the pressure difference between the inside and outside of the pipeline 1 becomes equal to or lower than the above reference pressure, the first lid receiving member 30 moves downward with respect to the lid frame 5, and as shown in FIG. 2, the first lid receiving member 30 is attached to the lid frame 5.

[0061] As described above, in this embodiment, as shown in FIG. 2, the lid 100 includes a support member 20 detachably disposed within a cylindrical lid frame 5, a lid body 10 detachably supported by the support member 20, a member 72 to be pressed, and a pressing member 73. The member 72 to be pressed is provided on the outer peripheral surface of the support member 20 and is pressed toward the inner peripheral surface of the lid frame 5 (here, the inner peripheral surface of the frame 9). As shown in FIG. 7, the pressing member 73 contacts the member 72 to be pressed and applies a pressing force thereto. The member 72 to be pressed is configured to be expandable and contractible toward the inner peripheral surface of the lid frame 5 by the pressing force applied by the pressing member 73. As a result, the member 72 to be pressed is provided between the lid frame 5 and the support member 20 that supports the lid body 10. At this time, even if the support members 20 have different sizes, by adjusting the magnitude of the pressing force with which the pressing member 73 presses the member 72 to be pressed, the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the frame 9 of the lid frame 5 can be adjusted. Therefore, even when support members 20 of various sizes are attached to the lid frame 5, by adjusting the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the frame 9 of the lid frame 5, the sealing performance between the lid frame 5 and the support member 20 can be ensured. Further, since the support member 20 is detachable from the lid frame 5, it can be easily removed from the lid frame 5.

[0062] In this embodiment, as shown in FIG. 2, the support member 20 has a vertical surface 21 provided on the outer peripheral surface of the support member 20 and extending vertically, and a horizontal surface 22 extending from the upper end of the vertical surface 21 toward the inner peripheral surface of the lid frame 5. The member 72 to be pressed is provided at a corner portion 85 formed by the vertical surface 21 and the horizontal surface 22 of the support member 20. When the member 72 to be pressed is provided at the corner portion 85 of the support member 20, the member 72 to be pressed is sandwiched between the lid frame 5 and the vertical surface 21 and is pressed against the horizontal surface 22. At this time, the member 72 to be pressed is restricted from extending upward and deformed by being pressed against the horizontal surface 22, and the sealing performance between the lid frame 5 and the support member 20 can be further ensured.

[0063] In this embodiment, as shown in FIG. 2, the member 72 to be pressed is disposed so as to be sandwiched between the lateral surface 22 of the support member 20 and the pressing member 73. The pressing member 73 is configured to apply a pressing force to the member 72 to be pressed from below. By adjusting the magnitude of the pressing force from the pressing member 73 to the member 72 to be pressed, the amount of crushing of the member 72 to be pressed can be adjusted, and the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the lid frame 5 can be adjusted. Therefore, even when support members 20 of various sizes are attached to the lid frame 5, the sealing performance between the lid frame 5 and the support member 20 can be ensured by adjusting the magnitude of the pressing force of the pressing member 73 against the member 72 to be pressed.

[0064] In this embodiment, the pressing member 73 is configured to be slidable in the vertical direction with respect to the support member 20. In this way, by sliding the pressing member 73 relative to the support member 20, the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the lid frame 5 can be adjusted.

[0065] In this embodiment, as shown in FIG. 2, the lid 100 includes a protruding portion 86 that protrudes upward from the upper end portion of the support member 20 toward the lid frame 5. As a result, when the lid 100 is attached to the lid frame 5, the gap between the lid frame 5 and the support member 20 is covered from above by the protruding portion 86. Therefore, it is possible to make it difficult for foreign matter such as dust to enter between the lid frame 5 and the support member 20.

[0066] In this embodiment, as shown in FIG. 7, the lid 100 includes a fixing mechanism 90 for fixing the position of the pressing member 73 with respect to the support member 20. As a result, the position of the pressing member 73 with respect to the support member 20 can be fixed in a state where the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the lid frame 5 is adjusted. Therefore, the lid 100 can be attached to the lid frame 5 in a state where the amount by which the member 72 to be pressed extends toward the inner peripheral surface of the lid frame 5 is adjusted.

[0067] In this embodiment, the second lid receiving member 70 of the lid 100 realizes a lid adapter. That is, as shown in FIG. 2, the second lid receiving member 70 is a lid adapter detachably provided between the cylindrical lid frame 5 and the lid body 10 disposed inside the lid frame 5. The second lid receiving member 70 includes a lid receiving main body 71 provided between the lid frame 5 and the lid body 10, a pressed member 72 provided on the outer peripheral surface of the lid receiving main body 71 and pressed toward the inner peripheral surface 9 of the frame of the lid frame 5, and a pressing member 73 that contacts the pressed member 72 and applies a pressing force toward the pressed member 72. The pressed member 72 is configured to be stretchable toward the inner peripheral surface 9 of the lid frame 5 by the pressing force applied by the pressing member 73. Here, the second lid receiving member 70 is disposed between the lid frame 5 and the lid body 10 (specifically, between the lid frame 5 and the first lid receiving member 20). At this time, by adjusting the magnitude of the pressing force with which the pressing member 73 presses the pressed member 72, the amount by which the pressed member 72 extends toward the inner peripheral surface 9 of the lid frame 5 can be adjusted. Therefore, by disposing the second lid receiving member 70 between the lid frame 5 and the lid body 10 and adjusting the amount by which the pressed member 72 extends toward the inner peripheral surface 9 of the lid frame 5, the sealing performance between the lid frame 5 and the second lid receiving member 70 can be ensured. Further, since the second lid receiving member 70 is detachable from the lid frame 5, it can be easily removed from the lid frame 5.

[0068] <Second Embodiment> Next, the lid 100A according to the second embodiment will be described. FIG. 8 is a cross-sectional view showing the lid 100A according to the second embodiment and is a view corresponding to FIG. 2. FIG. 9 is a view corresponding to FIG. 8 showing a state where the on-off valve 50 opens the intake passage 41. In this embodiment, as shown in FIG. 8, the lid 100A includes a lid body 10A, a support member 20A, a pressed member 72, and a pressing member 73. The support member 20A has a first lid receiving member 30A and a second lid receiving member 70. In this embodiment, since the configurations of the second lid receiving member 70, the pressed member 72, and the pressing member 73 are the same as those in the first embodiment, the description here is omitted.

[0069] In this embodiment, the first lid receiving member 30A has an intake function of taking in the air outside the pipeline 1 into the pipeline 1 and an exhaust function of discharging the air in the pipeline 1 to the outside of the pipeline 1.

[0070] In the first lid receiving member 30A, similar to the first lid receiving member 30 of the first embodiment, a seal member 31 is provided on the outer peripheral surface. Further, the first lid receiving member 30A is provided with a cylindrical lid receiving cylindrical portion 35A extending downward from the first lid receiving member 30A. In this embodiment, the lid receiving cylindrical portion 35A is composed of a plurality of members, but it may also be composed of one member.

[0071] An intake passage 41 is formed in the lid receiving cylindrical portion 35A. The intake passage 41 is for the air to pass through when taking in the air outside the pipeline 1 into the pipeline 1. The intake passage 41 is open upward and downward and penetrates the first lid receiving member 30A vertically. This intake passage 41 functions as an intake function.

[0072] FIG. 10 is a plan view showing the lid 100A according to this embodiment. In this embodiment, as shown in FIG. 10, the first lid receiving member 30A is provided with a mounting portion 45 and a transfer portion 48. As shown in FIG. 8, the mounting portion 45 is for mounting the lid body 10A. The mounting portion 45 is disposed, for example, inside the intake passage 41. As shown in FIG. 10, in a plan view, the mounting portion 45 is disposed at the central portion of the intake passage 41. Here, as shown in FIG. 8, the mounting portion 45 is in a cylindrical shape (specifically, a cylindrical shape) extending in the vertical direction. The outer peripheral shape of the mounting portion 45 is cylindrical. In this embodiment, as shown in FIG. 10, the mounting portion 45 and the inner peripheral surface of the first lid receiving member 30A are connected by the transfer portion 48. The transfer portion 48 is inserted between the first lid receiving member 30A and the mounting portion 45. The transfer portion 48 is in a rod shape extending radially outward from the mounting portion 45. A plurality (here, four) of transfer portions 48 are arranged along the circumferential direction of the mounting portion 45.

[0073] As shown in FIG. 8, the lid body 10A is supported by the support member 20A. Here, the lid body 10A is received by the first lid receiving member 30A. The lid body 10A is detachably attached to the first lid receiving member 30A. Here, the lid body 10A is provided on the upper part of the first lid receiving member 30A. Specifically, the lid body 10A is attached to the upper surface of the first lid receiving member 30A so as to cover the intake passage 41 from above. In the present embodiment, the lid body 10A bulges upward and protrudes above the support member 20 (specifically, the first lid receiving member 30A). The lid body 10A protrudes above the lid frame 5 and the ground.

[0074] The lid body 10A according to the present embodiment is formed in a so-called umbrella shape. The lid body 10A has a lid main body 15 and a shaft 16. The lid main body 15 covers the intake passage 41 from above. The shape of the lid main body 15 is not particularly limited, but here it is a dome shape protruding upward. The lid main body 15 has a space inside and is open downward. Also, the lid main body 15 is circular in plan view. The shaft 16 is connected to the center of the lid main body 15 and extends downward from the back surface of the lid main body 15. The cross-sectional shape of the shaft 16 is circular, but is not particularly limited.

[0075] In the present embodiment, intake holes 17 are formed in the lid body 10A. The intake holes 17 are formed in the lid main body 15 so as to penetrate the lid main body 15. The intake holes 17 open laterally. Here, a plurality of intake holes 17 are formed so as to be arranged along the circumferential direction of the lid main body 15.

[0076] Here, the lid body 10A is attached to the first lid receiving member 30A by fitting the shaft 16 into the cylindrical attachment portion 45 of the first lid receiving member 30A. The lid body 10A may be configured to rotate about the shaft 16 with respect to the first lid receiving member 30A, or may be configured not to rotate.

[0077] In this embodiment, the first lid receiving member 30A is provided with an opening / closing valve 50. As shown in FIGS. 8 and 9, the opening / closing valve 50 opens and closes the lower end of the lid receiving cylindrical portion 35A. When the lid receiving cylindrical portion 35A is opened and closed, the intake passage 41 is opened and closed. By closing the lid receiving cylindrical portion 35A with the opening / closing valve 50, it is possible to suppress the odor in the pipeline 1 from leaking to the outside through the intake passage 41. Here, the opening / closing valve 50 is attached to the lid receiving cylindrical portion 35A. The opening / closing valve 50 has an arm 51, a support shaft 52, a valve body 53, and a weight 54.

[0078] The arm 51 is provided on the outer peripheral surface of the lid receiving cylindrical portion 35A. The support shaft 52 is supported by the arm 51 and extends in a direction orthogonal to the axial direction of the lid receiving cylindrical portion 35A extending vertically, for example, in the horizontal direction. The valve body 53 can be attached to the lower end of the lid receiving cylindrical portion 35A. The valve body 53 is configured to open and close the lower opening in the lid receiving cylindrical portion 35A. The valve body 53 is supported by the support shaft 52 and is swingably supported by the arm 51 via the support shaft 52. Note that the shape of the valve body 53 is not particularly limited. In this embodiment, for example, the valve body 53 is flat and circular. The valve body 53 has a size such that it can cover the lid receiving cylindrical portion 35A from below. The valve body 53 is provided with a mounting portion 53a extending from the support shaft 52 toward the side opposite to the lid receiving cylindrical portion 35A.

[0079] The weight 54 is disposed on the side opposite to the valve body 53 with respect to the support shaft 52 and is swingably supported by the arm 51 via the support shaft 52. In FIG. 8, the valve body 53 is disposed on the left side of the support shaft 52, and the weight 54 is disposed on the right side of the support shaft 52. Here, the weight 54 is detachably attached to the mounting portion 53a of the valve body 53. In this embodiment, the valve body 53 and the weight 54 are separate bodies, but the valve body 53 and the weight 54 may be integrally formed.

[0080] In this embodiment, the weight of the weight 54 is greater than the weight of the valve body 53. Therefore, under normal conditions, when the difference between the pressure inside the pipeline 1 and the pressure outside the pipeline 1, in other words, the difference between the pressure below the valve body 53 and the pressure above the valve body 53 is small, an upward force acts on the valve body 53 around the support shaft 52. Therefore, as shown in FIG. 8, the valve body 53 is in a state of closing the lid receiving cylindrical portion 35A (in other words, the intake passage 41). On the other hand, when the pressure inside the pipeline 1 becomes lower than the pressure outside the pipeline 1 and the difference becomes large, a downward force acts on the valve body 53 around the support shaft 52. As a result, as shown in FIG. 9, since the valve body 53 rotates downward around the support shaft 52, the valve body 53 is in a state of opening the lid receiving cylindrical portion 35A (in other words, the intake passage 41).

[0081] In addition, in this embodiment, a ring-shaped seal member 49 may be provided at the lower end of the lid receiving cylindrical portion 35A. Here, the seal member 49 is provided at the lower end of the lid receiving cylindrical portion 35A so as to protrude downward from the lower end of the lid receiving cylindrical portion 35A. As shown in FIG. 8, this seal member 49 can come into contact with the on-off valve 50. Here, when the valve body 53 of the on-off valve 50 closes the lower end of the lid receiving cylindrical portion 35A, the valve body 53 comes into contact with the seal member 49. By this, when the valve body 53 closes the intake passage 41, the sealing performance between the lid receiving cylindrical portion 35A and the on-off valve 50 can be improved.

[0082] In this embodiment, similar to the first embodiment, the first lid receiving member 30A of the support member 20A is slidable up and down with respect to the lid frame 5 (in other words, the second lid receiving member 70). For example, the first lid receiving member 30A floats with respect to the lid frame 5. When the first lid receiving member 30A floats, a gap (for example, the gap S1 shown in FIG. 3) is formed between the first lid receiving member 30A and the second lid receiving member 70. Through the gap, the air inside the pipeline 1 is discharged to the outside of the pipeline 1. Therefore, in this embodiment, when the first lid receiving member 30A floats with respect to the lid frame 5, the gap formed between the first lid receiving member 30A and the second lid receiving member 70 functions as an exhaust function for discharging the air inside the pipeline 1 to the outside of the pipeline 1.

[0083] Also, in the present embodiment, as shown in FIG. 8, the first lid receiving member 30A is provided with a stopper 39 similar to that in the first embodiment. When the first lid receiving member 30A floats with respect to the lid frame 5, the claw portion 39b of the stopper 39 catches on the second lid receiving member 70 (specifically, the inner peripheral stepped portion 81a of the lower lid receiving cylindrical portion 81), thereby restricting the floating of the first lid receiving member 30A.

[0084] In the present embodiment, in a state where the lid 100A is attached to the lid frame 5, the intake passage 41 of the first lid receiving member 30A is in a closed state by the on-off valve 50. For example, when a large amount of drainage in the full pipe state pipeline 1 is discharged into the main sewer pipe, the inside of the pipeline 1 may become a negative pressure state. At this time, the pressure inside the pipeline 1 becomes lower than the pressure outside the pipeline 1. When the pressure difference between the inside and outside of the pipeline 1 at this time becomes higher than a predetermined first reference pressure, a downward force acts on the valve body 53 of the on-off valve 50 around the support shaft 52 in the support member 20A. As a result, as shown in FIG. 9, since the valve body 53 rotates downward around the support shaft 52, the valve body 53 opens the intake passage 41. By this, the air outside the pipeline 1 is introduced into the intake passage 41 through the intake holes 17 of the lid body 10A. The air introduced into the intake passage 41 enters the pipeline 1, increasing the pressure inside the pipeline 1 and making it difficult to become a negative pressure.

[0085] In the present embodiment, when the amount of drainage flowing through the pipeline 1 increases, the pressure inside the pipeline 1 rises. At this time, the pressure inside the pipeline 1 becomes higher than the pressure outside the pipeline 1. Here, when the pressure difference between the inside and outside of the pipeline 1 becomes higher than a predetermined second reference pressure, the first lid receiving member 30A floats with respect to the lid frame 5. When the first lid receiving member 30A floats, the claw portion 39b of the stopper 39 engages with the second lid receiving member 70 (specifically, the inner peripheral stepped portion 81a of the lower lid receiving cylindrical portion 81) from below. When the first lid receiving member 30A floats with respect to the lid frame 5, the intake passage 41 is in a closed state by the on-off valve 50.

[0086] When the first lid receiving member 30A floats with respect to the lid frame 5, a gap is formed between the second lid receiving member 70 and the first lid receiving member 30A. As a result, the air in the pipeline 1 flows to the outside of the pipeline 1 through the gap between the second lid receiving member 70 and the first lid receiving member 30A. As a result, the pressure in the pipeline 1 decreases. When the pressure in the pipeline 1 decreases and the pressure difference between the inside and outside of the pipeline 1 becomes equal to or less than the above-described second reference pressure, the first lid receiving member 30A moves downward with respect to the lid frame 5, and the first lid receiving member 30A is attached to the lid frame 5.

[0087] Thus, even in the support member 20A having the first lid receiving member 30A having an intake function and an exhaust function, the pressed member 72 and the pressing member 73 can be provided between the lid frame 5 and the support member 20A. By using the pressed member 72 and the pressing member 73, the sealing performance between the lid frame 5 and the support member 20A can be improved even if the support members 20A have different sizes.

[0088] <Third Embodiment> Next, the lid 100B according to the third embodiment will be described. FIG. 11 is a cross-sectional view showing the lid 100B according to the third embodiment, and is a view corresponding to FIG. 2. FIG. 12 is a view corresponding to FIG. 11 showing a state where the lid body 10B is floating. In the present embodiment, as shown in FIG. 11, the lid 100B includes a lid body 10B, a support member 20B, and a pressed member 72A. The support member 20B has a first lid receiving member 30B and a second lid receiving member 70A.

[0089] In the present embodiment, the first lid receiving member 30B has an exhaust function. A seal member 31 is provided on the outer peripheral surface of the first lid receiving member 30B in the same manner as in the first embodiment. Further, a stopper 39 is provided on the first lid receiving member 30B in the same manner as in the first embodiment.

[0090] In this embodiment, a lid receiving hole 37 is formed in the central portion of the first lid receiving member 30B. Similar to the second embodiment, the first lid receiving member 30B includes a cylindrical attachment portion 45B and a transfer portion 48B. The attachment portion 45B is disposed at the central portion of the lid receiving hole 37 in a plan view. The attachment portion 45B and the inner peripheral surface of the first lid receiving member 30B are connected by the transfer portion 48B. The transfer portion 48B is a rod-shaped member extending radially outward from the attachment portion 45B. A plurality (for example, four) of the transfer portions 48B are arranged along the circumferential direction of the attachment portion 45B.

[0091] The lid body 10B is detachably supported by the support member 20B. Here, the lid body 10B is detachably attached to the first lid receiving member 30B of the support member 20B. The lid body 10B fits into the lid receiving hole 37 of the first lid receiving member 30B. The lid body 10B has a lid main body 15B, a shaft 16B, and a lid stopper 17B. The lid main body 15B is formed in a circular shape in a plan view. In a plan view, the lid main body 15B is surrounded by the inner peripheral surface of the first lid receiving member 30B. The side surface of the lid main body 15B is inclined so as to be directed toward the center side as it goes downward. Here, a lid seal member 11 is provided on the side surface of the lid main body 15B as in the first embodiment.

[0092] The shaft 16B extends downward from the central portion of the back surface of the lid main body 15B. The shaft 16B is slidably inserted into the cylindrical attachment portion 45B of the first lid receiving member 30B. The lid stopper 17B is fixed to a portion of the shaft 16B below the attachment portion 45B. The radially outer end of the lid stopper 17B is located radially outside the inner peripheral surface of the attachment portion 45B. In a plan view, the attachment portion 45B and the lid stopper 17B partially overlap. Therefore, as shown in FIG. 12, when the lid body 10B moves upward with respect to the support member 20B, the lid stopper 17B and the attachment portion 45B come into contact with each other, so that the upward movement of the lid body 10B is restricted.

[0093] In this embodiment, when the amount of drainage flowing through the pipeline 1 increases, the pressure inside the pipeline 1 rises. At this time, the pressure inside the pipeline 1 becomes higher than the pressure outside the pipeline 1. Here, when the pressure difference between the inside and outside of the pipeline 1 becomes higher than a predetermined reference pressure, the lid body 10B floats due to the above pressure. As a result, the lid receiving hole 37 that was closed by the lid body 10B is opened. Therefore, the air inside the pipeline 1 flows out of the pipeline 1 through the lid receiving hole 37, so the pressure inside the pipeline 1 decreases. And when the pressure difference between the inside and outside of the pipeline 1 becomes equal to or lower than the above predetermined reference pressure, as shown in FIG. 11, it descends due to the self-weight of the lid body 10B and is placed on the support member 20B (here, the first lid receiving member 30B). As a result, the lid receiving hole 37 is closed by the lid body 10B.

[0094] In this embodiment, rainwater may flow through the pipeline 1. In this case, for example, during heavy rainstorms, a large amount of rainwater may flow into the pipeline 1. In this case, the rainwater rises inside the riser pipe 2, and an upward pressure is applied to the lid 100B by the rainwater. When the pressure applied to the lid 100B becomes equal to or higher than a predetermined first reference pressure, the lid body 10B floats from the support member 20B, and the lid receiving hole 37 is opened. As a result, the rainwater is discharged to the outside of the pipeline 1 through the lid receiving hole 37.

[0095] When the amount of rainwater overflowing from the pipeline 1 is large, the lid receiving hole 37 alone cannot discharge a sufficient amount of rainwater, and further pressure is applied to the lid 100B. When a second reference pressure greater than the first reference pressure is applied to the lid 100B, the first lid receiving member 30B floats from the lid frame 5, and the stopper 39 catches on the second lid receiving member 70A. At this time, a gap (for example, the gap S1 shown in FIG. 3) is formed between the first lid receiving member 30B and the second lid receiving member 70A. When the first lid receiving member 30B floats from the lid frame 5, the rainwater is discharged to the outside of the pipeline 1 through the gap and the lid receiving hole 37. When the rainwater is sufficiently discharged and the pressure applied to the lid 100B becomes smaller than the second reference pressure, the first lid receiving member 30B descends due to its own weight and is attached to the second lid receiving member 70A as shown in FIG. 11.

[0096] In this embodiment, as shown in FIG. 11, the second lid receiving member 70A of the support member 20B is detachably provided between the lid frame 5 and the first lid receiving member 30B. The second lid receiving member 70A includes a lid receiving body 71. Note that the lid receiving body 71 in this embodiment has substantially the same configuration as the lid receiving body 71 of the second lid receiving member 70 of the support member 20 in the first embodiment. Therefore, the description of the lid receiving body 71 here is omitted. Further, the lid 100B according to this embodiment does not include a pressing member 73 as in the first embodiment.

[0097] The member 72A to be pressed according to this embodiment is provided on the outer peripheral surface of the support member 20B, here on the outer peripheral surface of the second lid receiving member 70A, and is pressed from the outer peripheral surface toward the inner peripheral surface of the lid frame 5. Here, the member 72A to be pressed is provided at a corner portion 85 formed by the vertical surface 21 and the horizontal surface 22 of the support member 20B.

[0098] FIG. 13 is a perspective view showing the member 72A to be pressed of the lid 100B. In this embodiment, the member 72A to be pressed is arranged along the circumferential direction on the outer peripheral surface of the lower lid receiving cylindrical portion 81 of the second lid receiving member 70A in the support member 20B. As shown in FIG. 13, the member 72A to be pressed is in a ring shape. The member 72A to be pressed has a base portion 95 to be pressed and a contact portion 96 to be pressed. The base portion 95 to be pressed is provided along the circumferential direction on the outer peripheral surface of the lower lid receiving cylindrical portion 81. The base portion 95 to be pressed extends in the vertical direction and is in a ring shape. The base portion 95 to be pressed is attached to the outer peripheral surface of the lower lid receiving cylindrical portion 81. The contact portion 96 to be pressed extends obliquely outward from the lower end of the base portion 95 to be pressed. Here, the contact portion 96 to be pressed is inclined so as to extend radially outward as it goes upward from the lower end of the base portion 95 to be pressed. In this embodiment, the longitudinal section of the member 72A to be pressed is formed in an L shape by the base portion 95 to be pressed and the contact portion 96 to be pressed.

[0099] In this embodiment, the member to be pressed 72A (i.e., the base portion to be pressed 95 and the contact portion to be pressed 96) is formed of an elastic member having a predetermined elastic force (e.g., synthetic rubber such as EPDM). Thus, since the contact portion to be pressed 96 is formed of an elastic member, an elastic force is applied to the contact portion to be pressed 96 in the radially outward direction. As a result, the contact portion to be pressed 96 is pressed toward the inner peripheral surface of the lid frame 5 (here, the inner frame surface 9) by the application of the elastic force.

[0100] Even in the lid 100B according to this embodiment, as shown in FIG. 11, the member to be pressed 72A can be detachably provided between the lid frame 5 and the support member 20B. By using this member to be pressed 72A, even if the support members 20B have different sizes, the amount of outward expansion of the contact portion to be pressed 96 in the member to be pressed 72A is adjusted according to the size of the gap between the lid frame 5 and the support member 20B. For example, when the support member 20B is small and the gap between the lid frame 5 and the support member 20B is large, the amount of outward expansion of the contact portion to be pressed 96 of the member to be pressed 72A becomes large. On the other hand, when the support member 20B is large and the gap between the lid frame 5 and the support member 20B is small, the amount of expansion of the contact portion to be pressed 96 becomes small. Therefore, even if the support members 20B have different sizes, the sealing performance between the lid frame 5 and the support member 20B can be improved. Therefore, even when the member to be pressed 72A is used, the same effects as those of the member to be pressed 72 and the pressing member 73 in the first embodiment and the like can be obtained.

[0101] <Fourth Embodiment> Next, the lid 100C according to the fourth embodiment will be described. FIG. 14 is a cross-sectional view showing the lid 100C according to the fourth embodiment, and is a partially enlarged view. FIG. 14 is an enlarged view of the right side portion of the lid 100C and is a view corresponding to FIG. 2. In this embodiment, as shown in FIG. 14, the lid 100C includes a lid body 10C, a support member 20C, a member to be pressed 72C, and a pressing member 73C. Since the lid body 10C according to this embodiment has the same configuration as the lid body 10B according to the third embodiment, the description thereof will be omitted here.

[0102] Unlike the first to third embodiments, the support member 20C is integrally formed by one member. In the present embodiment, the support member 20C includes a first support portion 121 and a second support portion 122. The first support portion 121 is a portion that supports the lid body 10C. A lid receiving hole 37 is formed in the central portion of the first support portion 121. The lid main body 15B of the lid body 10C is attached to the lid receiving hole 37. Further, similar to the third embodiment, a cylindrical attachment portion 45B and a delivery portion 48B are provided on the first support portion 121. The attachment portion 45B is disposed at the central portion of the lid receiving hole 37 in a plan view. The shaft 16B of the lid body 10C is slidably inserted into the attachment portion 45B. The delivery portion 48B extends radially outward from the attachment portion 45B and connects the inner peripheral surface of the first support portion 121 and the attachment portion 45B.

[0103] In the present embodiment, a cylindrical lid receiving cylindrical portion 35C extending downward from the first support portion 121 is provided on the first support portion 121. For example, an on-off valve 50 (see FIG. 8) of the second embodiment may be provided at the lower end portion of the lid receiving cylindrical portion 35C.

[0104] The second support portion 122 is disposed outside the first support portion 121. The second support portion 122 is disposed so as to surround the first support portion 121 in a plan view. The second support portion 122 has a lower cylindrical portion 131, a flange portion 132, and an upper main body portion 133. The lower cylindrical portion 131 is a cylindrical member extending in the vertical direction. Here, a first protrusion 135 protruding outward is provided at the lower end portion of the lower cylindrical portion 131.

[0105] The flange portion 132 is connected to the upper end portion of the lower cylindrical portion 131. The flange portion 132 is cylindrical and extends outward from the upper end portion of the lower cylindrical portion 131. In the present embodiment, the support member 20C has a vertical surface 21C and a horizontal surface 22C. The vertical surface 21C is provided on the outer peripheral surface of the support member 20C, here on the outer peripheral surface of the lower cylindrical portion 131 of the second support portion 122, and extends vertically. The horizontal surface 22C is provided on the outer peripheral surface of the support member 20C, here on the lower surface of the flange portion 132 of the second support portion 122, and extends in a direction intersecting the vertical surface 21C. The horizontal surface 22C extends outward from the upper end of the vertical surface 21C. Here, a corner portion 85C is formed by the vertical surface 21C and the horizontal surface 22C of the support member 20C.

[0106] The upper main body portion 133 of the second support portion 122 is connected to the flange portion 132. The upper main body portion 133 extends upward from the flange portion 132. The upper main body portion 133 protrudes outward more than the flange portion 132. Also, the upper main body portion 133 is disposed outside the first support portion 121 and is connected to the first support portion 121. Here, the lower surface of the upper main body portion 133 is placed on the upper surface of the lower frame mounting portion 8a of the lid frame 5. In the present embodiment, the protruding portion 86 is provided at the upper end portion of the upper main body portion 133 of the second support portion 122 in the support member 20C and extends outward from the upper main body portion 133.

[0107] The pressed member 72C has the same configuration and shape as the pressed member 72 according to the first embodiment and is formed of the same material as the pressed member 72, so detailed description here is omitted. The pressed member 72C is ring-shaped and is provided on the outer peripheral surface of the support member 20C. The pressed member 72C is provided at the corner portion 85C formed by the vertical surface 21C and the horizontal surface 22C.

[0108] The pressing member 73C contacts the pressed member 72C and applies a pressing force to the pressed member 72C. The pressing member 73C is slidable in the vertical direction with respect to the support member 20C (specifically, the lower cylindrical portion 131 of the second support portion 122). In the present embodiment, the pressing member 73C is disposed outside the lower cylindrical portion 131 and below the flange portion 132. The pressing member 73C has a cylindrical shape (specifically, a cylindrical shape) extending in the vertical direction. Here, the pressing member 73C contacts the pressed member 72C from below and is configured to be slidable so as to crush the pressed member 72C upward. When the pressing member 73C slides upward while in contact with the pressed member 72C, a pressing force is applied to the pressed member 72C from below. As a result, the pressed member 72C is pressed against and crushed by the pressing member 73C. The pressed member 72C is configured to extend radially outward when pressed from below by the pressing member 73C. In the present embodiment, the amount of extension of the pressed member 72C in the radial outward direction is determined according to the degree to which the pressing member 73C presses against the pressed member 72C, that is, the magnitude of the pressing force applied to the pressed member 72C.

[0109] In the present embodiment, a second protrusion 136 is provided at the upper end portion of the pressing member 73C. The second protrusion 136 protrudes inward from the pressing member 73C. Here, in a plan view, at least a part of the second protrusion 136 overlaps with the first protrusion 135. Therefore, when the pressing member 73C slides downward, the second protrusion 136 engages with the first protrusion 135 of the support member 20C. Therefore, further downward movement of the pressing member 73C is restricted.

[0110] In the present embodiment, the lid 100C includes a fixing mechanism 90C. The fixing mechanism 90C fixes the position of the pressing member 73C with respect to the support member 20C. The fixing mechanism 90C includes a fixing flange 191 and a fixing bolt 192. Here, a first fixing hole 195 is formed in the support member 20C. The first fixing hole 195 is a hole that vertically penetrates the support member 20C and is formed between the first support portion 121 and the second support portion 122.

[0111] The fixed flange 191 is provided at the lower end of the pressing member 73C and extends inward from the pressing member 73C. The fixed flange 191 is plate-shaped. Here, a second fixing hole 196 penetrating the fixed flange 191 vertically is formed in the fixed flange 191. The second fixing hole 196 is formed in the fixed flange 191 so as to overlap the first fixing hole 195 in a plan view.

[0112] The fixing bolt 192 is inserted into the first fixing hole 195 of the support member 20C and the second fixing hole 196 of the fixed flange 191. By inserting the fixing bolt 192 into the first fixing hole 195 and the second fixing hole 196, the support member 20C and the pressing member 73C can be fastened. As a result, the vertical position of the pressing member 73C with respect to the support member 20C is fixed.

[0113] In the present embodiment, the fixing bolt 192 has a shaft portion 192a and a head portion 192b. The head portion 192b is connected to one end (here, the upper end) of the shaft portion 192a. The outer diameter of the head portion 192b is larger than the outer diameter of the shaft portion 192a. Here, a ring-shaped seal member 193 may be provided along the circumferential direction of the shaft portion 192a between the head portion 192b and the support member 20C. This seal member 193 is formed of an elastic member having a predetermined elastic force (for example, synthetic rubber such as EPDM). This seal member 193 improves the sealing performance between the support member 20C and the fixing bolt 192.

[0114] Even in this embodiment, the amount of radial outward extension of the member 72C to be pressed is adjusted according to the size of the support member 20C (i.e., the size of the outer diameter of the support member 20C). For example, when the support member 20C is small and the gap between the lid frame 5 and the support member 20C is large, the pressing member 73C is moved upward with respect to the support member 20C to increase the amount of extension of the member 72C to be pressed. On the other hand, when the support member 20C is large and the gap between the lid frame 5 and the support member 20C is small, the pressing member 73C is moved downward with respect to the support member 20C to decrease the amount of extension of the member 72C to be pressed. At the position of the pressing member 73C when the amount of extension of the member 72C to be pressed is adjusted in this way, the pressing member 73C is fixed to the support member 20C by the fixing mechanism 90C. Then, the support member 20C in the state where the amount of extension of the member 72C to be pressed is adjusted is attached to the lid frame 5. At this time, the member 72C to be pressed is pressed against the inner peripheral surface 9 of the frame of the lid frame 5, so that the sealing performance between the lid frame 5 and the support member 20C can be ensured. Therefore, even when the support member 20C is integrally formed by one member as in this embodiment, the same effects as those of the above-described embodiments can be obtained.

[0115] In addition, in the first to fourth embodiments, the support members 20, 20A, 20B, and 20C may be appropriately interchanged. For example, in the first to third embodiments, it is possible to use the support member 20C in the fourth embodiment.

[0116] In this embodiment, according to the functions to be provided in the pipeline 1, it is possible to appropriately select the lids 100, 100A, 100B, and 100C in the first to fourth embodiments to be attached to the lid frame 5. For example, when it is desired to provide an exhaust function in the pipeline 1, the lid 100 according to the first embodiment may be attached to the lid frame 5. Further, for example, when it is desired to provide both an exhaust function and an intake function in the pipeline 1, the lid 100A according to the second embodiment may be attached to the lid frame 5. In this way, the functions provided in the pipeline 1 can be changed by a simple method of changing the type of lid attached to the lid frame 5.

Description of Reference Numerals

[0117] 5 Lid frame 7 Frame cylinder part 8 Frame attachment part 8a Lower frame attachment part 8b Upper frame attachment part 10, 10A, 10B, 10C Cover 20, 20A, 20B, 20C Support member 21, 21C Vertical surface 22, 22C Horizontal surface 30, 30A, 30B First cover receiving member 70, 70A Second cover receiving member 72, 72A, 72C Pressed member 73, 73C Pressing member 81 Cover receiving lower cylindrical part 82 Cover receiving flange part 83 Cover receiving upper cylindrical part 85, 85C Corner part 86 Protrusion 100, 100A, 100B, 100C Cover

Claims

1. A support member detachably disposed within a cylindrical lid frame; A lid body detachably supported by the support member; A pressed member provided on an outer peripheral surface of the support member and pressed toward an inner peripheral surface of the lid frame; A pressing member that contacts the pressed member and applies a pressing force toward the pressed member; Comprising: The lid, wherein the pressed member is configured to be expandable and contractible toward the inner peripheral surface of the lid frame by the pressing force applied by the pressing member.

2. The support member: Has a vertical surface provided on the outer peripheral surface of the support member and extending vertically, and A horizontal surface extending from an upper end of the vertical surface toward the inner peripheral surface of the lid frame; Having: The lid according to claim 1, wherein the pressed member is provided at a corner formed by the vertical surface and the horizontal surface of the support member.

3. The pressed member is disposed so as to be sandwiched between the horizontal surface of the support member and the pressing member, The lid according to claim 2, wherein the pressing member is configured to apply the pressing force to the pressed member from below.

4. The lid according to claim 1, wherein the pressing member is configured to be slidable in a vertical direction with respect to the support member.

5. The lid according to claim 1, comprising a protruding portion protruding upward from an upper end portion of the support member toward above the lid frame.

6. The lid according to claim 1, comprising a fixing mechanism for fixing a position of the pressing member with respect to the support member.

7. A lid adapter detachably provided between a cylindrical lid frame and a lid body disposed inside the lid frame, A main body provided between the lid frame and the lid body, A pressed member provided on an outer peripheral surface of the main body and pressed toward an inner peripheral surface of the lid frame, A pressing member that contacts the pressed member and applies a pressing force toward the pressed member; Comprising: The lid adapter, wherein the pressed member is configured to be expandable and contractible toward the inner peripheral surface of the lid frame by the pressing force applied by the pressing member.

Images